查询词典 data base key

In this paper, the case study- the spatialization of China's population at the county level in the country scale can, on one side, obtain the population density of all kinds of terrain features across China. On the other side, the population density data at the county level can be integrated with environment data and social-economic data to generate 1-km grid data sets of average population density, average capacity of natural resources and others derived from environment data. And these data could be useful to monitor China's resource management, population dynamics and so on. The example study has demonstrated a plausible method of wisely using discrete point data to carry out some practical studies.

本文通过全国县级行政单位人口数据的空间化过程，一方面可以重新得到各种类型区人口居住密度的预设值或经验值；另一方面，可以将空间化后的人口数据与其他自然资源、环境数据和社会经济等数据进行有效的融合，将能得到1km格网的人均自然资源占有量、人口密度以及其他经济、环境指标的派生数据信息，这对于我们国家的自然资源管理和宏观调控、人口的动态监测等，均具有重要的实际意义。

Thirdly, in order to manage these data better, the paper advances the organization methods of data of commixed Database of Geo-spatial Framework model by integrating some advanced database technologies such as RDBMS and the Spatial Database Engine, namely on the basis of database and the data of Geo-spatial Framework divided in a preceding part of this paper, it describes layer-delaminating, block-dividing, slice-connecting, map-dividing and BLOB etc. to organize spatial data, including DLG, DOM, DEM, and thematic data, taking example for the data of urban planning. At the same time it also realizes integrated management of these data.

然后，本文以管理这些地理空间框架数据为主要目标，集成关系数据库管理系统以及空间数据引擎等相关技术，提出了地理空间框架混合数据库数据组织方法，即以地理空间框架数据库为基础，以分类后的地理空间框架数据为对象，通过采用分层、分块、连片、分幅以及大二进制对象等方法对基础空间数据(包括数字线划数据、数字正射影像数据、数字高程模型数据)和专题数据进行统一组织，并实现了这些数据的关联一体化管理。

In a contactless IC card that performs envelope detection on an ASK-modulated carrier wave and demodulates the carrier wave to recover data piggybacked thereon, demodulation is suspended during periods where there is no possibility of a change of a data value (from data 0 to data 1, or from data 1 to data 0) in the digital data piggybacked on the carrier wave.

一种非接触式IC卡，其作用是检波经ASK调制过的载波的包络线和对载波进行解调以恢复承载在载波上的数据。在这种非接触式IC卡中，在承载在载波上的数字数据的数据值不可能变化（从数据0变成数据1，或从数据1变成数据0）期间暂缓进行解调操作。

The design of this dissertation begins with the definition of audience data structure based on considering the embedded developing environment features. The dissertation uses the STi5518 chip by ST Microtones to collect audience data, and then the SI analysis and OSD interactive function are used to gain the user watching information. Then collect audience data in EEPROM of STB, use STB and serial to transmit the data, then use the RS232 serial port and RJ-45 converter to realize the data Return of Serial to Ethernet, in the process of data Return it completes the conversion of data format.

本设计首先在嵌入式环境的前提下，在用户数据采集和回传工作中采用了ST Microtones公司提供的STi5518芯片作为机顶盒主芯片，根据收视率调查需要制定出用户的收视信息数据结构，并结合数字电视业务信息分析以及机顶盒的屏幕显示互动功能，对用户的收视情况进行记录；然后把记录的数据存储到机顶盒的EEPROM中，并利用机顶盒串口输出数据，再利用RS232串口与RJ-45转换器实现串口转以太网的数据回传，在回传过程中完成了数据格式的转换。

Satelliate altimetery data compared with the data of Wusong tide gauge data , LianyunGang tide gauge data ,as well as five tide gauge data in middle north of Jiangsu, It verifies that it is feasible to separate sea surface and land surface absolute changes using T/P satellite altimerer data compared with tide gauge data at the same time. Moreover, it discusses absolute land change in the middle of Jiangsu in recent 10 years.

此外，通过卫星测高获得的绝对海面变化速率与同时段的吴淞验潮站、连云港验潮站以及江苏中部其他5个验潮站数据的对比分析，论证了利用T/P卫星测高数据与同区段、同时段验潮站数据对比来分离海面、地面绝对变化的可行性；并且对苏北沿海近10年米的地面绝对升降问题进行了探讨，获得了一些新的认识。

An embodiment of the invention discloses an automatic retransmission requesting method in a relay network. The method comprises the following procedures: storing the data and transmitting the data to the receiving end when a relay station RS confirms that the data from the transmitting side is correctly received; returning an affirmative response of the corresponding data to the transmitting side by the RS when the RS confirms that the data corresponding to the response information is correctly received by the receiving end according to the response information from the receiving end; and retransmitting the corresponding data when the RS confirms that the data stored by itself is not correctly received by the receiving end according to the response information.

本发明实施例公开了一种中继网络中的自动重传请求方法，该方法包括：中继站RS确定正确接收到来自发端的数据时，保存所述数据，将所述数据转发给收端；所述RS根据来自所述收端的应答信息，确认所述应答信息对应的数据已被所述收端正确接收，则向所述发端返回对应数据的肯定应答；所述RS根据所述应答信息确定自身已保存的数据未被所述收端正确接收，则向所述收端重传对应数据。

The BCH coded authentication data is modulated by chaotic sequence and then embedded into the DCT domain of the image by using the owner's private key.The embedding process is controlled by Just Noticeable Difference of the DCT block.Users can extract the authentication data with the public key,while they can't get the private key to destroy or delete the watermark through the public key.

提出一种基于非对称水印的图像认证改进算法，算法中将经过BCH编码和混沌序列调制的认证信息作为水印，利用所有者私钥嵌入图像DCT域，嵌入过程根据DCT块的可视噪声阈值控制，用户可以利用公钥从水印图像中提取认证信息，但无法从公钥中获取任何私钥信息，从而无法破坏或删除水印。

Based on the theory of Sequence Stratigraphy and the systematically analysis of strata which was closely focused on Lithostratigraphy, Biostratigraphy, Paleoecology Event Stratigraphy and Sequence Stratigraphy, four long-term base-level cycles can be recognized in the Mesozoic, each long-term base-level cycles can be further divided into intermediate-term to short-term base-level cycle. Eight intermediate-term base-level cycles are recognized in Mesozoic; Cenozoic can be divided into two structural base-level cycles, and can be further divided into seven long-term baselevel cycles.

应用层序地层学理论，在详细的岩石地层、生物地层、生态地层、事件地层和层序地层为核心的综合地层研究基础上，将中生界划分为四个长期基准面旋回，每个长期基准面旋回内部又可进一步识别出更次一级的旋回，侏罗系内部共可识别出8个次级旋回；根据钻井层序地层与地震地层划分结果，将北缘地区新生界划分为两个构造基准面旋回，其内部又可进一步划分为7个长期基准面旋回。

When we determine strip-base breadth on the basis of design codes, the realistic base area of the strip-base is less than the calculated base area resulting in insufficient bear-load capability of ground, because the base breadths don't contain overlapping part of strip- bases.

按规范方法确定的条形基础宽度，由于未考虑纵横墙条形基础的重叠部分，所构成的基底实际面积比计算所需的基底面积减少，相应地造成其地基承载力的不足。

In a cellular mobile network, whether a user can be served by a particular base station depends on the distance of the user and the base station. If we can make balance between the load of high-load base station and low-load base station in a block, then the base station can allow more users to get into and provide service.

在蜂巢式网路架构中，基地台的负载量是不相同的，如果能让高负载的基地台和低负载的基地台做负载平衡，基地台将能容纳更多的使用者，提供更多的服务。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。